Hello, i am new to hand guns and looking for some information regarding hand gun ammunition. I recently picked up a Ruger gp100 6". 357 magnum. I wanted a well built revolver for my first gun and i think the Ruger fits the criteria perfectly for me, I have shot it several times at the range and love it so far. I am looking for reccomendations regarding ammunition for this gun. I am somewhat confused by differences in bullet velocities/ grain weight and the relationship between the two, if there is somewhere online somone could point me to for more information i would really appriciate it. I am just looking for more information to help me make the best choice for picking the right ammo. thanks in advance. CHRIS.